Wrench



Aug. 12 1924. 1,504,909

L. SATTER WRENCH Filed Dec. 14, 1922 Patented Aug. 12, 1924.

UNITED STATES LEW SATTER, OF WILEY, WASHINGTON.

WRENCH.

Application filed. December 14, 1922. Serial No. 606,958.

. upon which it is used.

Second: To provide means for operating the jaws of the pipe wrench without the use of spiral screw, ratchets or other devices for moving same.

Third: To provide means for operating the jaws of pipe wrenches by adjusting same by a single movement of the parts of the wrench and without the use of spiral screw, ratchets, chains or other devices.

Fourth: To provide means for adjusting the jaws of pipe wrenches by automatically releasing the jaws upon an upward movement of the handle of the wrench.

In the drawings,

Figure 1 is a plan view of the improved pipe wrench.

Figure 2 is an edge viewof the same, and

Figure 3 is a transverse section taken on the line 5-5 of Figure 1.

Referring to the drawings A andH are the two jaws or heads, the jaw H being carried by the bar X; while the jaw A is carried by the notched bar T.

A casing B envelops the two bars and is pivoted to the bar X as indicated at I. In-

wardly of the point I is the pivot point S for the pawl or dog L which is adapted to cooperate with the notches T and the pawl is provided with a pin or knob K projecting through a slot in the casing B for manipulation of the pawl. Th pawl is pressed by the spring J against the notches T.

In operation the wrench is placed upon the pipe to be turned and the two jaws A and H are pushed together by hand. The pipe may be turned. To loosen the wrench from the pipe the handle bar X may be lifted or the pin K depressed whereby to permit the separation of the jaws A and H.

I claim:

A wrench comprising a pair of substantially parallel bars adapted to move longitudinally with respect to one another, a handle on one of said bars, heads on both bars having mutual gripping teeth to receive a pipe, one of said bars having a series of notches on its inner side, a casing enveloping both bars and pivoted to one of the bars, a pivoted pawl carried by said casing between the bars and adapted to cooperate with the notches on said bar whereby to hold the jaws in substantially fixed position, said casinghaving a slot, a pin connected to the pawl and slidable through said slot, said casing having a closed wall against which the outer face of the notched bar slides and abuts, said casing also having a second wall opposite the first mentioned wall against which the outer face of the companion bar is adapted to engage, said walls adapted to prevent undue separation of the bars such as would cause the jaws to swing together and crush the pipe held therebetween, said notched bar having a limited lateral movement in and relative to the casing toward the companion bar, said pivoted pawl having a plurality of teeth adapted to simultaneously engage the notches in the bar over a relatively wide area, a flat spring on such companion bar for urging the toothed portion of the pivoted pawl toward the notched bar and for yieldingly holding the notched bar against the first named closed wall of the casing, said toothed portion of the pawl being at an intermediate portion of said casing and its first named closed wall, the pivot point of the pawl being inwardly of the pivot point of the casing toward said notched bar.

LEW SATTER.

(ill 

